Examine source code of brown

{
  "name": "brown",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "корич.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(184, 144, 103, 1)",
      "toolbar": "rgba(0, 0, 0, 0.2)",
      "bookmark_text": "rgba(255, 207, 153, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.2)",
      "toolbar_field_text": "rgba(209, 151, 104, 1)",
      "tab_line": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b48852c9-a656-4043-a2c1-7c2ca1a4b21d}"
    }
  }
}